We are a family owned and operated business with over 30 years of experience in the industry. We specialize in making custom U-bolts, leaf spring repairs, new leaf springs for trailers and heavy/medium/lightweight vehicles, as well as all of the accompanying hardware. We currently work with many ...

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a year ago
These guys are awesome. They always are able to fix me up with trailer parts for the suspension or springs and ubolts for all the different vehicles we work on. Check them out if you need springs, Timbren air suspension bags, u-bolts.
- Catherine E
a year ago
Very satisfied. I came in needing a new pin for my leaf spring as well as u-bolts. They had the pin waiting for me when I got there and gave me a little direction on how to best replace it on my truck. They also made me u-bolts while I waited (A whole 3 minutes). I will definitely be coming back. We need more places like this.
- Christian C
a year ago
Terry and Dan are great guys to work with. Great to do business with awesome guys, steel is made in the US and these guys make excellent product’s and have even better customer service. I highly recommend Duluth Superior Spring!!
- Bridger S
Custom u-bolts, leaf springs for autos, trailers, etc., leaf spring repairs, center bolts, eye bolts, clamps

Contact Us


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  • (218) 481-7444


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115 North 24th Avenue West suite A3
Duluth, MN 55806

Business Hours

Mon:7:30 AM – 3:30 PM
Tue:7:30 AM – 3:30 PM
Wed:7:30 AM – 3:30 PM
Thu:7:30 AM – 3:30 PM
Fri:7:30 AM – 3:30 PM
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